Radio telephonograph



june 28, 1932. j 53 BROWNlNG 1,865,395

RADIO TELEPHONOGRAPH Filed April 16. 1925' Patented June 28, 1932 UNITED STATES JOHN BAILEY BROWNING, F CAMDEN, NEW JERSEY RADIO TELEPHONOGRAPH Application filed April 16, 1925. Serial No. 23,569.

This application is a continuation in part of application Serial No. 570,906 filed June 26, 1922, which matured into Patent 1,743,706 dated January 14, 1930. Reference is also made to the following applications, all of which have been carved out of the same parent case 7 Application Serial No. 170,794 filed F ebruary 25, 1927 which matured into Patent No.

10 1,743,707, dated January 14, 1930.

Application Serial No. 169,306 filed February 18, 1927.

Application Serial No. 309,793 filed October 2, 1928.

The above mentioned applications and patents disclose a device in which a radio receiving set, a phonograph and a sound recording means are so combined into a unitary system or scheme whereby it may be used in any one or more of the following ways (a) As an ordinary radio receiving set;

(5) As a radio recording means;

(0) As an ordinary phonograph;

(cl) As a phonograph, in which certain partsvof the radio receiving set, notably the detector circuit and/or amplifier and the source of potential, which may be the electric light circuit or a single series of batteries, can be utilized for increasing the volume of the phonograph record reproducing means;

(6) To transmit ultra audio impulses and audible sound simultaneously;

(f) To broadcast ultra-audio impulses while phonographically recording audible sound impulses simultaneously; and

(g) To phonographically record a radio production on a record blank while it is being listened to.

These various modes of operation are described in application Serial No. 309,793 and Patent 1,743,706 mentioned above. The present application is drawn to cover the unitary system when it is used either as a radio receiving set or as a phonograph in which certain parts of the radio receiving set are used to increase the volume of the record reproducing means.

With these objects in view, the invention is diagrammatically illustrated in the accompanying drawing in which F Figure 1 is a vertical diagrammatic cross section through an illustrative embodiment of my invention, showing the wiring arrangement.

Figure 2 is an enlarged plan view of the double goose neck carrying the mechanical sound recorder or reproducer and the electrical recorder-reproducer-receiver-transmitter.

Figure 3 is a diagrammatic illustration of a modified form of circuit.

In the embodiment shown in Figure 1 my invention is housed within a cabinet 1 which may be of any desired form provided with a hinged cover 2 and horizontal partitions 3 and 3a dividing the cabinet into chambers 4, 55 5 and 5a.

A turntable 6 is rotatably mounted in the upper chamber 4 and carries a record tablet or blank 7. Arranged to swing in a horizontal path above the record 7 is a hollow tapering tone arm 8 provided with a T connection 9 which has pivotally connected thereto smaller tapered tube extensions 10 and 11. Disengageably connected to the smaller end of 11 is a mechanical sound recorderreproducer- 7 receiver-transmitter 12. The element 12 may comprise the usual diaphragm, stylus lever and recording or reproducing stylus.

The element 16 may comprise the assemb ling of the element 12 with the essential ele- 30 ments of a telephone receiver such as disclosed by Baldwin in his Patent 1,153,593, Figures 1 and 2, the details of which are fully disclosed in application Serial No. 309,793 above referred to. Both elements 12 and 16 are pivotally mounted for movement with respect to each other and toward and away from the support 6; either or both may be entirely supported by the arm, 8 when turned back and resting thereon.

A hollow nonvibratory rigid bracket 20 is mounted in the chamber 5, the smaller end of which communicates with the larger end of the arm 8 and the larger end with a resonator 21 which it carries and supports free from the walls of the cabinet. The bracket is also provided with a plurality of rigid extensions 22 and 23, each of which carry an electrically operated transmitter-receiver 25 and 26. An

ranged a tuning condenser 38.

electro-dynamic loud speaker 27 is also connected to the bracket.

The sound chamber 5 is provided with sound openings 30-31 which may be provided with tone control doors 32. The chamber 5a is provided with openings covered with a door 33. A panel 34 is removably mounted within the cabinet spaced free from its vibrating walls on which may be mounted all the essential elements of a radio set, which are shown diagrammatically in the chamber 5a connected to the several elements 16, 25, 26 and 27.

The radio set includes a radio receiving and transmitting circuit, a plural stage audio frequency amplifier and a common source of potential 72 for all of the electrical elements, or means to make the house electric light circuit suitable for the purpose. It also includes two antenna circuits, one of which is a loop 35 provided with conductors to the switch points 36 and 37 across which is ar- The other antenna 40 may be extended from the cabinet and positioned as desired either outside of or within the room. A tuning condenser 41 is connected in series with the antenna 40. T we switch points 43 and 44 are each provided with leads, one to the condenser 41 and the other to the ground 42. A pivoted double pole or throw switch 45 is provided, one side of which is connected to the primary 48 of a variable coupler and the other side of which may be switched from the switch points 4344 to the points 3637 from the antenna ground circult to the loop circuit, one of which may betuned to long wave and the other to short' wave reception or transmission.

The secondary 49 of the variable coupler is connected in the plate circuit of the power detector vacuum tube 50. The input of the primary 48 is connected in the grid circuit and the other end is connected in the filament Circuit of the tube 50.

Numerals 51 and 52 indicate the grid leak and grid condenser respectively. Their value will depend upon the kind and type of detector tube used.

Numeral 54 denotes a switch lever which may be moved to contact points 55, 56 or 57 to switch element 16 into or out of the plate or grid circuit of the tube 50. Contact points 55 and 56 are in the plate circuit, point 55 also including a battery. Contact point 57 is in the grid circuit (equivalent to the input of the radio circuit).

The audio frequency amplifier may include several stages; only two stages being shown for purposes of illustration. Numeral 60 indicates the tube of the first stage and 61 the power tube of the last stage upon which a very high potential may be applied.

The first and second transformers are in dicated as 62 and 63. v a

Suitable jacks 64 and 65 are shown connected to the output of the tubes 60 and 61.

Numerals 68, 69 and 70 indicate the rheostats which control the filaments of the tubes 50, 60 and 61. These may be used, if desired, to switch either of the tubes out of circuit.

. Numeral 72 indicates a single source of potential, which may comprise a power pack including the essential elements of an A, B and C eliminator or other means for making the house electric circuit suitable for the purpose or it may comprise a series of connected battery cells provided with the desired number of taps. Numeral 73 indicates a plug for connection to the house electric circuit. One of the conductors 88 leads from the potential negativeto the filament rheostats and one numbered 89 to the tap having the desired potential for energizing the filaments of the tubes 50, 60 and 61.

The leads 90 and 91 are tapped off to apply the desired potential to the primary of the transformers 62 and 63 and the lead 92 con nects the plate of the power tube 61 through the jack 65 to the high potential of the power pack 72.

Numeral 75 indicates a lead connecting the element 16 with the switch arm 54 and the numeral 76 indicates the lead connecting the element 16 with the desired tap of the potential 72. y A plug isv connected to the leads 75 and 76, and is adapted to be connected to either of the jacks 64 or 65. When the plug 85 is connected to the ack 64, the element 16 is operative in at least four different ways. First as a loud speaker for signals passed by the tubes 50 and 60, with or withoutthe cooperation of the loud speaker 27.

Second, to electrically reproduce a phonograph record positioned on the turntable 6, when the rheostats 68 and 69 are turned down.

Third, as a microphone for sounds produced locally.

Fourth, to record radio signals passed by the tubes 50 and 60 on a record blank positioned on the turntable 6. In this mode of operation the rheostats 68 and 69 are turned TVhen the element 16 is connected to the plug 65 it is operative either as a loudspeaker or as a phonograph recorder. In both'of these modes it may be used with or without the elements 25,26 or 27.

The numerals 79 and 80 indicate leads connecting the elements 25 and 26 with the plug 78 which is adapted to be connected with either jack 64 or 65. The numerals 82 and 83 indicate leads connecting the element 27 with the plug 81 also adapted to be connected to either of the jacks 64 or 65.

In the embodiment diagrammatically shown in Figure 3, numeral 110 indicates a vacuum tube having an input and an output circuit upon which a very high potential may be applied by means of the battery or other source of potential 100.

Numeral 102 denotes an electrically operated telephone receiver which may be of any desired type. A high resistance potentiometer 104 with a shunt switch of the desired type 106 are placed in series with the source of voltage. lVith the switch open the combined reaction and resistance of 104 should be of that critical value to just stop the oscillations at any capacity of the tuning condenser 108, a condition that is achieved by adjusting 104. At this point the loop 112 will act as a receiver for radio spark or speech signals. However, when the switch is closed, the potential is applied to the vacuum tube 110 which will cause the tube to oscillate and the circuit to become sensitive to signals from 114 or 114.

Numerals 114 and 114 each indicates a sound recorder-reproducer-receiver-transmitter, similar to element 16 of the first embodiment. Each of these devices may be mounted on the opposite ends of a double goose neck and either may be turned down to cooperate with a record or blank 7 mounted for rotation on the conventional turntable of a phonograph.

The foregoing description has been made rather detailed for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible in view of the prior art.

hat I claim is as follows:

1. In a radio-telephonograph, the combination of a cabinet provided with a chamber, phonograph and radio sound reproducing means carried by said cabinet outside of said chamber, a sound amplifier enclosed within said chamber and communicating with said sound reproducing means, a high frequency set for detecting ultra-audio frequency signals enclosed within said cabinet to actuate said radio sound reproducing means and connections for selectively operating said set so as to reproduce radio signals at times and at other times to electrically reproduce sounds from a phonograph record by means of said phonograph sound reproducing means.

2. In a radiotelephonograph, the combination with a secondary sound reproducing means for reproducing recorded sound and a second secondary sound reproducing means for reproducing sound from a physically disconnected source, a high frequency set for detecting ultra audio signals connected with and operative to actuate said last mentioned reproducng means, a cooperating sound amplifier, a cabinet enclosing the major portion of said amplifier, a hollow rigid bracket carried by said cabinet and communicating with both of said sound reproducing means as well as with the sound amplifier, and connections for selectively operating said set so as to reproduce radio signals'at timesand at other times to electrically reproduce sound from phonograph record through said first mentioned secondary sound reproducing means.

3. In aradio-telephonograph, the combination with a cabinet providing a compartment, a sound tube supported to swing outside of said compartment and havinga plurality of small transverse end sections extending laterally therefrom, phonograph sound reproducing means communicating with one of said end sections, radio sound reproducing means communicating with another of saidsections, electrical means within said cabinet to transform ultra audio impulses and means for selectively operating said electrical means so as to reproduce radio signals at times and at other times to reproduce recorded sound and deliver the said signals or said recorded sound reproduction to said sound tube.

4. In a radio-telephonograph, the combination with phonograph and radio sound reproducing means and a radio circuit connected with and operative to actuate said radio sound reproducing means, of a cooperating sound amplifier comprising a major and a minor hollow portion, said major portion being in communication with said radio sound reproducing means and said minor portion being in communication with said phonograph sound reproducing means and connections for selectively operating said circuit so as to reproduce radio signals at times and at other times to electrically reproduce sound from a phonograph record by meansof said phonograph sound reproducing means.

5. In a radio-telephonograph, the combination with a hollow movable member mounted to swing on a fixed axis, phonograph and radio sound reproducing means carried thereby and communicating therewith, a radio circuit connected'with and operative to actuate said radio sound reproducing means and connections for selectively operating said circuit so as to reproduce radio signals at times and at other times to electrically reproduce sounds from a phonograph record by means of said phonograph reproducing means.

6. In a radio-telephonograph, in combination with a T shaped sound conveyor mounted on a vertical aXis, a sound conveying tube connected with each lateral arm of said sound conveyor, a phonograph sound box connected to one of said tubes, a radio sound reproducer connected to the other of said tubes, a radio circuit connected with and operative to actuate said radio sound reproducer and connections for selectively operating said circuit so as to reproduce radio signals at times and at other times to electrically reproduce sounds from a phonograph record by means of said phonograph sound reproducing means.

7. In a sound reproducing machine, the combination with a hollow member mounted to swing on a fixed axis, phonograph sound reproducing means carried thereby and communicating therewith, an electro-magnetic sound reproducer also carried by and com- 5 municating with said hollow member, a radio circuit operative to actuate said last named reproducer and means for selectively operating said radio circuit to actuate said last named reproducer at times and at other times to electrically reproduce sound from a phonograph record by means of said phonograph sound reproducing means.

8. In a sound reproducing machine, the combination with a cabinet having a compart-ment, a sound amplifier within said compartment, means for reproducing sound from arecord tablet outside of said compartment, a sound conduit connecting said amplifier to said reproducing means and an electrically operated sound reproducer connected to said conduit and operative to discharge sound thereinto.

9. In a sound reproducing machine, the combination with a cabinet having a partition, a sound amplifier on one side of said partition, means for reproducing sound from a record on the other side of said partition, a sound conduit connecting said amplifier to said reproducing means and an electrically actuated sound reproducer connected to said conduit and operative to discharge sound thereinto. Y

10. A combined phonograph and amplifying telephone receiver comprising a sound amplifier, a pivotally mounted tone arm communicating therewith, a sound box unit mounted upon said tone arm for coaction with a phonograph record, means sustaining the entire weight of said tone arm independ- 9 ently of said sound box, and a telephone receiver fixed to said tone arm near said sound box, to communicate the vibrations impressed thereon through said tone arm.

In testimony whereof I afiix my signature.

4 JOHN BAILEY BROWVNING. 

